HIGH RISE BUILDINGS USING STEEL OR CONCRETE

High Rise Buildings Using Steel Or Concrete

ABSTRACT

Composite borders comprising of concrete-filled iron alloy tubular (CFST) pillars and iron alloy beam are being utilised more and more popularly in construction structures. In UK, the composite border organisations are often blended with strengthened solid shave partitions to pattern a high-rise construction system. However, there was seldom data on the seismic presentation of this kind of blended construction. Shaking table checks on two construction forms with 30 storeys comprising of composite borders and RC shave partitions were therefore offered in this paper. CFST pillars with circular and rectangle parts were utilised in the composite borders respectively. Three types of genuine earthquake notes, encompassing Taft (EW), El Centro (NS) and Tianjin swell with top accelerations of 0.2g, 0.4g, 0.6g, and 0.8g, were directed respectively to simulate distinct grades of earthquakes in the tests. It was discovered that the composite borders cooperated well with the centre RC shave partition structure under earthquakes, and the two construction forms displayed very good seismic performance.

Table of Content

ABSTRACTii

CHAPTER 01: INTRODUCTION1

Outline of the Study1

Problem Statement1

Rationale1

Aims and Objectives2

Significance3

Theoretical Frame work3

Limitation of the Study5

Ethical Concerns5

Reliability6

Validity7

CHAPTER 02: LITERATURE REVIEW8

CHAPTER 03: METHODOLOGY13

Research Design13

Mix Methodology13

Case Study16

Data Analysis17

Experimental Procedure18

Description of above20

Fabrication of the mixed structures22

Results27

Testing program27

Instrumentation31

CHAPTER 04: ANALYSIS AND DISCUSSION33

Analysis of Results33

Dynamic characteristics33

Discussion35

Damping ratio35

Acceleration response factor37

Storey drifts38

Shear force and storey acceleration41

Strain distributions45

Failure modes47

CASE STUDY49

CHAPTER 05: CONCLUSIONS AND RECOMMENDATIONS58

REFERENCES59

CHAPTER 01: INTRODUCTION

Outline of the Study

Concrete-filled steel tubular (CFST) columns had been widely used in civil engineering projects in the past decades, they have been proved to be inherently efficient in load carrying capacity, fire resistance, stiffness, ductility and energy absorption capacity, and fast in construction 1. ASCCS. Concrete filled steel tubes — a comparison of international codes and practices. In: ASCCS seminar. 1997.[1].

Problem Statement

Composite frames consisting of concrete-filled steel tubular (CFST) columns and steel beams (named CFST frames in this paper) are being used more and more popularly in building structures. In UK, CFST frame structures are often mixed with reinforced concrete (RC) shear walls to form a high-rise building system to resist both the vertical and lateral loads efficiently. However, there is still not sufficient information on the seismic design of this type of mixed structural system.

Rationale

In the past, there have been a large number of research studies on the performance of CFST columns. These literatures had been reviewed by [2], [3] and [4]. Several state of the art reports or papers were also published recently on CFST structures, such as [5], [6], [7] and 8. N.E. Shanmugam and B. Lakshmi, State of the art report on steel-concrete composite columns, J Constr Steel Res 57 (10) (2001), pp. 1041-1080. Article | PDF (268 K) | View Record in Scopus | Cited By in Scopus (50)[8]. There also had been some studies performed on the behaviour of CFST beam-to-column connections, such as [9] and [10]. But there is still very limited information on the CFST frames to RC shear wall mixed building systems under seismic ...